clark



(Model.) 4 2 sheets-sheen 1.

JpK.. CLARK.

KNOBVATTAGHMENT. 188284881.V Patentd'sepml, 1888.

2 sheetssheet 2.

(Model.)

J. K. CLARK. KNOB ATTACHMENT.

Non. 284,331. Patentedgsept, 4, 11883.

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N. PETERSy Phon en whingmn. n. c,

.Nrrnn STATES JOHN konnen, OF BUFFALO, New YORK.

KNOB ATTACHMENT.

ECIFIATIN forming part ofvLetters Patent No. 284,381, dated September 4, 1883;

. Application filed June 7,1883. (Model.)

To @ZZ whom it may concern: y

Be `it known that I, JOHN KQCLARK, a citi-` knob-Shanks are employed to actuate the latchbolt of a mortise-lock; and my invention has for its objects to provide simple and efficient 1 means for adjusting and firmly securing an independent knob-shank and its spindle to varying thicknesses of doors, to avoid the use of long spindles on the knob-shanks, to dispense with thenecessity of employing screws for attaching the knobs to their independent shanks or spindles, and to render it unnecessary to use "washersK in adjusting` knobs to varying thicknesses of doors. These objects I accomplish in the manner and by the means herein- `after described, and illustrated in the accompanying drawings, in which- Figure l represents `a perspective view of a mortise-look case, with the cover-plate broken away to illustrate lthe latch-bolt and the yoke,

also showing the knob shank and spindle and its attaching and adjusting device in perspective 5 Fig. 2, a vertical sectional View through the hub of the lock, showing portions of a door in section and two knobs and their vspindles adjusted and `secured in position according to my invention; Fig.` 3, detached perspective views of the knob shanks and spindies, the devices for adjusting and` securing them to a door, and the hub and latch ofthe lock; and Fig. 4, avertical sectional view similar to Fig. 2, showing a modification Of the invention; Fig. 5, a perspective View of a modified form of plate or collar, and Fig. 6 a vertical central sectional view of Fig. 5.

In the drawings I have shown only sufficient of the lock mechanism to illustrate my invention, the numberl indicating the lock-casing; 2, the latch-bolt; 3, the yoke formoving the latch-bolt, and 4 the hub of the latch-case for operating the yoke, this hub, as shown in Figs. l, 2, and 3, beinginade in two halves, in order th at the independent knobs, shanks, and spindles can be rotated independently of each other. The knob 5 is rigidly nxed to a shank,

6, which is screw-threaded approximately onehalf its length, and is provided at its inner end with a short angular projection, forming a spindle, 7, which is of such length as to enter but one section or half of the hubof the latch, the hub having an angular socket and the spindle being correspondingly shaped,

whereby rotation of the shank will rotate one 6o section orhalf of the hub and operate the latch-bolt.

The device by which the knob shank and spindle are adjusted and secured nrmly in position is composed of a plate or collar, 8, having a screw-threaded orifice, 9, said plate or collar being arranged against the side of the door, in rear ofthe escutcheon or rose I0, with its screw-threaded oriiiee in line with the opening' in the hub, in such manner that the 7o angular spindle, after being properly passed through the escutcheon and the plate or collar" and inserted in one section or half of the i hub, the plate or collar-can then be rotated on the screw-shank until it bears against the i side of the door, after which Ithe escutcheon or rose is secured in position on the door `by means of screws or otherwise, theplate or collar being held against rotation by a seat in the rose, as at 11. The knob can now be ro- 8o tated to operate the hub, `and thereby actuate the latch-bolt, and all strain or thrusts ineident to opening or closing the door or pulling on the knob will be directly received and resisted by the threads of the plate or collar and the shank, thus relieving all parts of the latch-casing and its contained mechanism from injury or displacement.

Where two knobs are used to move independent of the other, each, with its shank and 9o spindle, will be applied as above set forth 5 and `where the attachment `is to be applied to a latch having a single or undivided hub, as

shown in Fig. 4, the parts will be applied in the same manner; but-in this instance the rotation of one knob will rotate the other knob through the medium of the hub; `but still the advantage of independent swiveled knobshanks is obtained and an exceedingly simple and eflieient means provided for adjusting and IOO" firmly securingthe knobs and shanks to doors 1 of varying thickness, which is of considerable importance in this class oflock-latches. By my invention I can use asingle knob at one side of the door. I avoidthe necessity of providing the spindle with a hook to engage the lock-case or the hub, which greatly strains these parts of the latch in pulling on the knob; and the attachment is applicable to any style of latch, even though already manufactured or 1n use.

I have shown the plate or collar as secure to the doorby screws l2; but this is not essential7 as the seat 11 provided inthe escutcheon 0r rose will prevent rotation of the plate or coliian'ged collar is adapted to set.

having a screw-threaded orice, with the independent knob, having a spindle adapted to 25 pass through the orifice of the plate or collar and `have its end enter the rotating hub of a latch, substantially as described.

2. The combination, with a mortise-latch case having a rotating hub to actuate the 30 latchlbolt, of an independent knob having a screw-threaded shank and a short angular spindle at the inner end thereof, which partially passes through the hub, and a plate or collar having a screw-threaded orifice engag- 3 5 ing the knob-shank between the spindle and the knob for adjusting and securing the knob, substantially as described. Y

In testimony whereof I have hereunto set my hand in the presence of two subscribing wit- 4o nesses.

JOHN K. CLARK.

Witnesses:

CHARLEs B. HILL, WM. A. ALLEN. 

